How do you pass level 6? Having a hard time...

What do you mean? Do you mean fighting monsters to level up?

Just keep fighting monsters! If you click Profiles on the game menu, then on the character, it'll tell you how many points Rhen(or any of the characters) needs before leveling up. Just so you know, if you're working on trying to beat Lorad in order to pass the trials, try buying a few lightning scrolls, saving the game, then challenging him. The lighning scrolls do a heck of a number on him and take him out quickly. I only needed one to defeat him! If it doesn't work the first time, reload the game, level up a little, then try again with the lightning scrolls. It just takes sooooo long to keep leveling up just to be strong enough to use slide thrust.